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Wolfenstein 3D Source Code Documentation

repository·master·Indexed 25 days ago

https://github.com/id-software/wolf3d

Original source code for Wolfenstein 3D released by id Software. Includes technical details on its ray casting refresh architecture, dynamically compiled scaling routines, and page manager caching scheme. Provides compilation requirements for Borland C++ 3.0 or 3.1 and outlines the Limited Use Software License Agreement for educational use.

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What's inside Wolfenstein 3D

  1. Understand the Wolfenstein 3D architecture and limitations

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    The source code reflects the original PC Wolfenstein 3D project architecture. Key technical notes include:

    • Rendering: Uses a ray casting refresh architecture. While a BSP-based texture mapper might be faster, ray casting was chosen for its simplicity at the time.
    • Scaling: Uses dynamically compiled scaling routines. While efficient on original uncached target hardware, these can cause code cache thrashing and performance degradation on modern processors. A simple looping texture mapper is recommended for 486+ machines.
    • Memory Management: Includes a page manager caching scheme that is noted as being unnecessarily complex.
    • Code Structure: Contains a high number of #ifdef directives.

    Potential Project Ideas:

    • Adding new monsters or weapons.
    • Implementing taller walls and vertical motion (requires a texture mapper rewrite).
    • Converting to a 32-bit compiler to reduce code size.
    • Developing a multiplayer mode using DOOM sersetup / ipxsetup drivers.

  2. Compile and run Wolfenstein 3D source code

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    To compile the Wolfenstein 3D source code, use BORLAND C++ 3.0 or 3.1. The code was verified to compile perfectly in these versions before being released.

    Important Requirements:

    • The source code does not include game assets. To run the executable built from this code, you must provide data from a released version of wolf or spear (a shareware version is sufficient).
    • The original source release was managed using the DEICE.EXE installer, which extracts the contents into a WOLFSRC directory.

  3. Review the Wolfenstein 3D Limited Use Software License

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    The software is provided under a LIMITED USE SOFTWARE LICENSE AGREEMENT. By downloading the software, you agree to the following key terms:

    • Educational Use: You may use portions of the Source Code (such as specific routines) to develop your own software for educational purposes. This is the only permitted way to use the code to create new software.
    • Prohibited Commercial Use: You may not commercially exploit the software. This includes renting, selling, leasing, offering on a pay-per-play basis, or distributing for money.
    • Ownership: All copyrights, including source code, artwork, music, and software tools, are owned by ID Software, Inc. You have no ownership or proprietary rights.
    • No Warranties: The software is provided "as is" without any warranties of merchantability or fitness for a particular purpose. ID is not liable for any loss of data, profits, or damages.